[GRASS-user] Cut DEM by SHP

[Salvator*eL*arosa]

Hamish wrote:
> 
> Salvator*eL*arosa wrote:
>> 
>> Is it possible to cut a raster (dem) through a shape or a vector?
> 
> If I understand correctly:  (there are other 3D tools for planes)
> 
> g.region rast=MapName
> v.to.rast
> 
> then either create a raster map named MASK (see r.mask) or
>   r.mapcalc newmap='if(isnull(vect_mask), null(), MapName)'
>                   # if(  this , then do this,  else do this  )
> 
> 
> Hamish
> 
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> 
Thanks. 
But with MASK is it not permanent?
while with r.mapcalc it's permanent map.

sorry my english!
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